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for (1+x)-n = 1 - nx +n(n+1)/2! - n(n+1)(n+2)/3! for (1+x)-3 = 1 - 3x + 6x2 - 10x3 now putting x as 2 (1+2)-3 = 1 - 3(2) + 6(4) -10(8) = 1-6+24-80 = -61 but 3-3 is 1/27 which is not -61. please tell me why the difference. |
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Answer» for (1+x)-n = 1 - nx +n(n+1)/2! - n(n+1)(n+2)/3! for (1+x)-3 = 1 - 3x + 6x2 - 10x3 now putting x as 2 (1+2)-3 = 1 - 3(2) + 6(4) -10(8) = 1-6+24-80 = -61 but 3-3 is 1/27 which is not -61. please tell me why the difference. |
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